Cam and roller lubricating means for warp knitting machines



Aug. 19, 1947. F, LAMBACH I 2,425,744

CAM AND ROLLER LUBRICATING MEANS FOR WARP KNITTING MACHINES Filed DEC. 29, 1944 INVENTOR f/TZ LA B/x CH BY ATTORNEY Patented Aug. 19, 1947 CAM AND ROLLER LUBRICATING MEANS FOR WARP KNITTING MACHINES Fritz Lambach, Tenafly, N. J. Application December 29, 1944, Serial No. 570,251

11 Claims.

My invention relates to warp knitting machines, and more particularly to the lubrication of the working surface of cams and cam rollers arranged in such warp knitting machines.

Modern warp knitting machines are being built for receiving warp beams of larger size than customary in hitherto known warp knitting machines. While the warp beams used in hitherto known warp knitting machines can be arranged at a sufficiently high level so as to permit access to certain cams and cam rollers for lubrication by hand from time to time, the larger and heavier warp beams of modern warp knitting machines require the arrangement of such warp beams in such a position relative to the cams and cam rollers, that they render same inaccessible for lubrication by hand. Furthermore, modern warp knitting machines run at a rather high speed, so that a constant automatic lubrication of the working surface of the cam and cam rollers by drip lubricators is impossible, as, owing to the rather high speed of the operating elements, such a type of lubrication would cause a soiling of the warp yarns and fabric by drops of oil splashed thereon by the action of centrifugal forces.

An object of my invention is to provide a lubrication for cam means of warp knitting machines, by means of which the working surface of the cams and cam rollers may be automatically provided with a constant film .of oil without the danger of soiling warp yarns and fabric.

Another object of my invention is to provide means for such an automatic lubrication of cam means of warp knitting machines which do not require a refilling with a lubricant for a considerable length of time, for example several weeks.

A further object of my invention is to provide means for such an automatic lubrication of cam means of warp knitting machines, which simultaneously removes dirt, grit, or the like from the working surface of the cams and cam rollers, thus reducing wear and tear thereof to a minimum.

It is understood that the term cam means used in the specification and claims includes a cam and a cam roller.

With the above and other objects of the invention in view, the invention consists in the novel construction, arrangement and combination of various devices, elements and parts, as set forth in theclaims hereof, certain embodiments of the same being described in the specification and being illustrated in the accompanying drawings forming part of this specification, wherein:

, Fig." 1 is a fragmentary front elevational view of cam means equipped with a device for the lubrication of the working surface of the cam roller,

Fig. 2 is a side elevational view of the cam means shown in Fig. 1,

Fig. 3 is a fragmentary front elevational view of cam means equipped with a device for the lubrication of the working surface of the cam, and

Fig. 4 is a front elevational view of cam means equipped with a different embodiment of a, device for the lubrication of the Working surface of the cam.

Referring now to Figs, 1 and 2, l0 indicates a cam roller rotatably mounted on a pin l2 immovably secured to a cam roller lever I4 in a manner known per se. A cam l6 keyed to a rotatable cam shaft (not shown) is in engagement with the working surface of the cam roller H).

The actuating lever l4 swingably mounted at l8 is connected with a mechanism of the warp knitting machine in a manner known per se. Duringthe operation of the machine, the cam l6 driven by the rotating cam shaft causes a rotation of the cam roller Ill on the pin I2 and rocking movements of the actuating lever l4 on the shaft H3 in dependence on the shape of the working surface of the cam.

According to the invention, a holder 20 having two arms 22, 24 forming a slot for receiving a pad 26 is secured to the flange 28 of the pin I 2 by means of a screw 30. The free ends of the arms 22, 24 are secured to each other by a cotter pin connection 32. A spring 34, the ends of which are engaged with holes in lugs 36, 38 at opposite sides of the arms 22, 24, is in engagement with the upper surface of the pad 26 and tends to urge the lower surface thereof under slight pressure against the working surface of the cam roller I0. In a preferred embodiment, the pad 26 is made of felt, however, the pad may be made of any other suitable material, for example leather, which may be impregnated with a lubricant, is capable of re taining the lubricant for several weeks, and is capable of giving off some lubricant onto the Working surface of the rotating cam roller so as to lubricate same.

If, after a period of time, the lubricant of the pad 26 is used up, the spring 34 may be bent sidewards for disengagement from the pad and may be brought into a position for engagement with the holderZll at 40, whereupon the old pad 26 may be readily removed from the slot formed by the arms 22 and 24. Now a new pad impregnated with a lubricant may be inserted into the slot and the spring 34 may be returned into the position shown in the drawings, whereupon the lubricating device is again ready for use. As will be readily understood, such a replacement of a pad may be carried out in a short time.

During the operation of the warp knitting machine, the pad 26 provides the working surface of the cam roller Ii] with a constant film of oil or other lubricant; furthermore, the pad 26 urged against the rotating cam roller It by the spring 34 wiper off dirt and grit which may accumulate on the working surface of the cam roller, and prevents the throwing of drops of oil onto the warp yarn an'd/ or the fabric by centrifugal forces. The lubrication of the working surface of the cam roller III by the pad 26 further results in an efficient lubrication of the working surface of the cam I6 contacting the working surface of the cam roller I0.

According to the embodiment of a lubricating-- device shown in Fig. 3, the pad I26 of felt or other suitable material impregnated with a lubricant is held in contact with the working surface of the cam H6. The construction of the holder I20 carrying the pad I26 substantially corresponds to the construction of the holder 20 shown in Figs. 1 and 2, so that a detailed description is unnecessary. However, according to the embodiment shown in Fig. 3, the holder I20 is mounted on a resilient element I36 secured to the cam roller lever IHI. Said resilient element I36 on one hand assists in urging the pad I26 against the cam H6 and on the other hand permits movements of the holder I20 relative to the cam roller lever I I4 in dependence on the shape of the working surface of the cam I I6 engaged by the pad I26 held in the holder I20.

Fig. 4 illustrates a different embodiment of the lubricating device for the lubrication of the working surface of a cam 2I6 keyed to a cam shaft 238. A holder 226 having a slot 243 for receiving a pad 226 of felt or other suitable material impregnated with a lubricant is mounted at one end of a spring 236, the other end of which is secured to a-stationary part M2 of the warp knitting machine. The pad 226 is held in the holder 220 by means of a clamping device 244 secured into a threaded bore of the holder. The spring 236 tends to urge the pad 226 against the Working surface of the cam 2 I 6, so that it closely follows its curvature and lubricates same during'a rotation of the cam by giving off some lubricant, If, after a period of time, the pad 226 shall be replaced by a new pad, the clamping screw 2% is loosened, whereupon the pad 226 may be removed from the slot 240 and a fresh pad may be inserted therein.

The lubrication of the working surface of the cam according to the embodiments shown in Figs.

3 and 4, likewise results in a, lubrication of the working surface of the cam roller contacting the cam.

I have described preferred embodiments of my invention, but it is clear that numerous changes and omissions may be made without departing from the spirit of my invention.

What I claim is:

1. In a warp knitting machine, the combination of: a movable cam roller lever, cam means including cooperating cam elements, one of said cam elements being formed by a rotatable cam, the other cam element being formed by a cam roller rotatably mounted on said cam roller lever, a pad of a material capable of being impregnated with a lubricant, a holder arranged for carryin said pad, said pad being detachably mounted on said holder, and displaceable resilient means an ranged on said holder for urging said pad into '4 contact with the working surface of one of said cam elements, said material being capable of retaining the lubricant over a period of time and of giving off a certain amount of the lubricant onto said working surface of the cam element for lubricating same.

2. In a warp knitting machine, the combination of: a rotatable cam, a movable cam roller lever, a cam roller rotatably mounted on said cam roller lever for cooperation with said cam, a pad of a material capable of being impregnated with a lubricant, and a holder carried by said cam roller lever and arranged for holding said pad in contact with the working surface of said cam roller, said material being capable of retaining the lubricant over a period of time and of giving off a certain amount of the lubricant onto said working surface of the cam roller for lubricating same.

3. In a Warp knitting machine, the combination of: a rotatable cam, a movable cam roller lever, a cam roller rotatably mounted on said cam roller lever for cooperation with-said cam, a pad of a material capable of being impregnated with a lubricant, a holder carried by said cam roller lever and arranged for holding said pad adjacent the Working surface of said cam roller, and resilient means engaged with said pad for urging same against said working surface of the cam roller, said material being capable of retaining the lubricant over a period of time and of giving off a certain amount of the lubricant onto said working surface of the cam roller for lubricating same.

4. In a warp knitting machine, the combination of: a movable cam roller lever, cam means including cooperating cam elements, one of said cam elements being formed by a rotatable cam, the other cam element being formed by a cam roller rotatablymounted on said cam roller lever, a pad of a material capable of being impregnated with alubricant, a holder arranged for carrying said pad, said holder having an aperture, said pad being inserted into said aperture, and a spring stretched from one side of said holder over said pad to the other side of said holder forurging said pad into contact with the working surface of one of said cam elements, said material being capable of retaining the lubricant over a period of time and of giving off a certain amount of the lubricant onto said working surface of the cam element for lubricating same.

5. In a warp knitting machine, the combination of: a rotatablecam, a movable cam roller lever, a cam roller rotatably mounted on said cam roller lever-for cooperation with'said cam, a pad of a material capable of being impregnated with a lubricant, aholder c'arried'by said cam roller lever and arranged for holding'sai'd pad in contact with the working surface of said cam roller. said pad being 'detachably' mounted on saidholder, and 'displaceable holding means arranged on said holder for'holding said deta'chablepadin its position, said material being capable of retaining the lubricant over a period of time'a'nd of giving off a certain amount of the-lubricant onto "said working: surface 'of the cam roller'for lubricating same.

6. In a warp'knittin'g machine, the combination of asrotatabl'e cam', amovabl' cam roller lever, a cam roller rotatably'mount'ed 'on 'saidcam roller lever for cooperation with said cam-, a pad of a material capable of being impregnated with a lubricant, a zhol'd'er carried'by-said cam roller stretched from on side of said holder over said pad to the other side of said holder for urging said pad into contact with the working surface of said cam roller, said material being capable of retaining the lubricant over a period of time and of giving off a certain amount of the lubricant onto said working surface of the cam roller for lubricating'same.

7. In a warp knitting machine, the combination of: a rotatable cam, a movable cam roller lever, a cam roller rotatably mounted on said cam roller lever for cooperation with said' cam, a pad of a material capable of being impregnated with a lubricant, a holder carried by said cam roller lever and arranged for carrying said pad, said pad being detachably mounted on said holder, and displaceable resilient means arranged on said holder for urging said pad into contact with the working surface of said cam, said material being capable of retaining the lubricant over a period of time and of giving off a certain amount of the lubricant onto said working surface of said cam for lubricating same.

8. In a warp knitting machine, the combination of: a rotatable cam, a movable cam roller lever, a cam roller rotatably mounted on said cam roller lever for cooperation with said cam, a pad of a material capable of being impregnated with a lubricant, a holder carried by said cam roller lever, said holder having an aperture, said pad being inserted into said aperture, and a spring stretched from one side of said holder over said pad to the other side of said holder for urging said pad into contact with the working surface of said cam, said material being capable of retaining the lubricant over a period of time and of giving off a certain amount of the lubricant onto said working surface of said cam for lubricating same. 4

9. In a warp knitting machine, the combination of: a rotatable cam, a movable cam roller lever, a cam roller rotatably mounted on said cam roller lever for cooperation with said cam, a pad of a material capable of being impregnated with a lubricant, a resilient element secured to said cam roller lever, and a holder mounted on said resilient element for holding said pad in contact with the working surface of said cam, said material being capable of retaining the lubricant over a period of time and of giving off a certain amount of the lubricant onto said working surface of said cam for lubricating same.

10. In a warp knitting machine, the combination of: a rotatable cam, a movable cam roller lever, a cam roller rotatably mounted on said cam roller lever for cooperation with said cam, a pad of a material capable of being impregnated with a lubricant, a resilient element secured to said cam roller lever, a holder mounted on said resilient element and arranged for carrying said pad, said pad being detachably mounted on said holder, and displaceable resilient means arranged on said holder for urging said pad into contact with the working surface of said cam, said material being capable of retaining the lubricant over a period of time and of givin off a certain amount of the lubricant onto said working surface of said cam for lubricating same.

11. In a warp knitting machine, the combination of: a rotatable cam, a movable cam roller lever, a cam roller rotatably mounted on said cam roller lever for cooperation with said cam, a pad of a material capable of being impregnated with a lubricant, a resilient element secured to said cam roller lever, a holder mounted on said resilient element, said holder having an aperture, said pad being inserted into said aperture, and a spring stretched from one side of said holder over said pad to the other side of said holder for urging said pad into contact with the working surface of said cam, said material being capable of retaining the lubricant over a period of time and of giving off a certain amount of the lubricant onto said working surface of said cam for lubricating same.

FRITZ LAIWBACH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,980,209 Kinsella Nov. 13, 1934 2,317,186 Fowler Apr. 20, 1943 183,108 Beal Oct. 10, 1876 1,708,225 Koreger Apr. 9, 1929 2,007,217 Rose July 9, 1935 FOREIGN PATENTS Number Country Date 627,392 Germany Mar. 14, 1936 

